Ответ:

Перевод задания: Исправь ошибки.

  1. They were going to the theatre at 6 o’clock yesterday. (Вчера в 6 часов они шли в театр.)
  2. She was reading the book then. (Тогда она читала книгу.)
  3. My friends were playing football at 7 o’clock last night. (Вчера вечером в 7 часов мои друзья играли в футбол.)
  4. We were buying a book at that moment. (В тот момент мы покупали книгу.)
  5. Mary was having dinner at 6 p.m. (Мэри ужинала в 6 часов вечера.)
  6. My friends were reading the whole day yesterday. (Вчера весь день мои друзья читали.)
  7. Your sister was washing up from 6 to 7 o’clock yesterday evening. (Вчера вечером с 6 до 7 твоя сестра мыла посуду.)
  8. My mother wasn’t cooking the whole morning yesterday. (Вчера утром моя мама всё утро не готовила.)

В Past Continuous используется форма was/were + глагол с окончанием -ing; was — с подлежащим в единственном числе, were — во множественном.